GHSA-P2JH-44QJ-PF2V

Vulnerability from github – Published: 2022-11-10 12:38 – Updated: 2022-11-10 12:38
VLAI?
Summary
Exfiltration of hashed SMB credentials on Windows via file:// redirect
Details

Impact

When following a redirect, Electron delays a check for redirecting to file:// URLs from other schemes. The contents of the file is not available to the renderer following the redirect, but if the redirect target is a SMB URL such as file://some.website.com/, then in some cases, Windows will connect to that server and attempt NTLM authentication, which can include sending hashed credentials.

Patches

This issue has been fixed in all current stable versions of Electron. Specifically, these versions contain the fixes:

  • 21.0.0-beta.1
  • 20.0.1
  • 19.0.11
  • 18.3.7

We recommend all apps upgrade to the latest stable version of Electron.

Workarounds

If upgrading isn't possible, this issue can be addressed without upgrading by preventing redirects to file:// URLs in the WebContents.on('will-redirect') event, for all WebContents:

app.on('web-contents-created', (e, webContents) => {
  webContents.on('will-redirect', (e, url) => {
    if (/^file:/.test(url)) e.preventDefault()
  })
})

For more information

If you have any questions or comments about this advisory, email us at security@electronjs.org.

Credit

Thanks to user @coolcoolnoworries for reporting this issue.

Severity ?
5.4 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "18.3.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "20.0.0-beta.1"
            },
            {
              "fixed": "20.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "electron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.0.0-beta.1"
            },
            {
              "fixed": "19.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-36077"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-522"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-11-10T12:38:57Z",
    "nvd_published_at": "2022-11-08T07:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nWhen following a redirect, Electron delays a check for redirecting to file:// URLs from other schemes. The contents of the file is not available to the renderer following the redirect, but if the redirect target is a SMB URL such as `file://some.website.com/`, then in some cases, Windows will connect to that server and attempt NTLM authentication, which can include sending hashed credentials.\n\n### Patches\nThis issue has been fixed in all current stable versions of Electron. Specifically, these versions contain the fixes:\n\n- 21.0.0-beta.1\n- 20.0.1\n- 19.0.11\n- 18.3.7\n\nWe recommend all apps upgrade to the latest stable version of Electron.\n\n### Workarounds\nIf upgrading isn\u0027t possible, this issue can be addressed without upgrading by preventing redirects to file:// URLs in the `WebContents.on(\u0027will-redirect\u0027)` event, for all WebContents:\n\n```js\napp.on(\u0027web-contents-created\u0027, (e, webContents) =\u003e {\n  webContents.on(\u0027will-redirect\u0027, (e, url) =\u003e {\n    if (/^file:/.test(url)) e.preventDefault()\n  })\n})\n```\n\n### For more information\nIf you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org).\n\n### Credit\nThanks to user @coolcoolnoworries for reporting this issue.",
  "id": "GHSA-p2jh-44qj-pf2v",
  "modified": "2022-11-10T12:38:57Z",
  "published": "2022-11-10T12:38:57Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/electron/electron/security/advisories/GHSA-p2jh-44qj-pf2v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-36077"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/electron/electron"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Exfiltration of hashed SMB credentials on Windows via file:// redirect"
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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